US2933456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of silica-alumina compositions
Assignee: ChampionX LLC
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Filing: 1954-06-07
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Granted: 1960-04-19
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Expires: 1974-06-07
Abstract
No abstract record available.
Inventors
- 👤 David G Braithwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:00
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A PROCESS FOR PREPARING CLEAR, GLASS-LIKE SILICA-ALUMINA COMPOSITIONS SUITABLE FOR USE AS A PETROLEUM HYDROCARBON CRACKING CATALYST WHICH COMPRISES PRECIPITATING SILICA IN HYDROUS FORM BY ADDING TO AN AQUEOUS ALKALI METAL SILICATE SOLUTION A QUANTITY OF A MINERAL ACID SUFFICIENT TO PRECIPITATE THE SILICA IN HYDROUS FORM WHILE RETAINING THE PH ABOVE ABOUT 5, SAID ACID BEING FROM THE GROUP CONSISTING OF SULFURIC ACID AND HYDROCHLORIC ACID, ADDING TO THE RESULTANT SLURRY AN AQUEOUS SOLUTION OF A SOLUBLE ACIDIC ALUMINUM SALT CONTAINING THE ALUMINUM IN THE CATION PORTION, SAID ACIDIC ALUMINUM SALT BEING FROM THE GROUP CONSISTING OF ALUMINUM SULFATE AND ALUMINUM CHLORIDE, ADDING TO THE RESULTANT SLURRY AN AQUEOUS SOLUTION OF SODIUM ALUMINATE SUFFICIENT ONLY TO PARTIALLY NEUTRALIZE SAID SLURRY AND RECOVERING THE RESULTANT SOLID PRODUCT CONTAINING SILICA IN HYDROUS FORM IMPREGNATED WITH ALUMINA SIMULTANEOUSLY PRECIPITATED FROM AN ALUMINUM SALT IN WHICH THE ALUMINUM EXISTS IN THE CATION PORTION OF THE SALT AND FROM THE SODIUM ALUMINATE.
Claim 2
Dependent Claim
158 words
A PROCESS FOR PREPARING CLEAR, GLASS-LIKE SILICA-ALUMINA COMPOSITIONS SUITABLE FOR USE AS A PETROLEUM HYDROCARBON CRACKING CATALYST WHICH COMPRISES PRECIPITATING SILICA IN HYDROUS FORM BY ADDING TO AN AQUEOUS ALKALI METAL SILICATE SOLUTION A QUANTITY OF A MINERAL ACID SUFFICIENT TO PRECIPITATE THE SILICA IN HYDROUS FORM WHILE RETAINING THE PH ABOVE ABOUT 5, SAID ACID BEING FROM THE GROUP CONSISTING OF SULFURIC ACID AND HYDROCHLORIC ACID, ADDING TO THE RESULTANT SLURRY AN AQUEOUS SOLUTION OF A SOLUBLE ACIDIC ALUMINUM SALT CONTAINING THE ALUMINUM IN THE CATION PORTION, SAID ACIDIC ALUMINUM SALT BEING FROM THE GROUP CONSISTING OF ALUMINUM SULFATE AND ALUMINUM CHLORIDE, ADDING TO THE RESULTANT SLURRY AN AQUEOUS SOLUTION OF SODIUM ALUMINATE SUFFICIENT ONLY TO PARTIALLY NEUTRALIZE SAID SLURRY AND RECOVERING THE RESULTANT SOLID PRODUCT CONTAINING SILICA IN HYDROUS FORM IMPREGNATED WITH ALUMINA SIMULTANEOUSLY PRECIPITATED FROM AN ALUMINUM SALT IN WHICH THE ALUMINUM EXISTS IN THE CATION PORTION OF THE SALT AND FROM THE SODIUM ALUMINATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |